US4052209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductive and sensitized photoconductive compositions
Assignee: 3M Co
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Filing: 1975-03-07
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Granted: 1977-10-04
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Expires: 1995-03-07
Abstract
Abstract Semiconductive compositions are produced by the inclusion of a particular class of dyes into a polymeric binder. When the binder is an organic photoconductive binder, the dyes act as exceptionally good sensitizers for the photoconductive material.
Inventors
- 👤 William A. Huffman
- 👤 Stephen P. Birkeland
- 👤 Kevin P. O'Leary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:34
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0601; G03G5/0605; G03G5/0607; G03G5/0609; H; H01; H01B; H01B1/00; H01B1/06; H01B1/12; H10; H10K; H10K30/00; H10K30/30; H10K30/50; H10K85/00; H10K85/10; H10K85/141; H10K85/146; Y; Y02; Y02E; Y02E10/00; Y02E10/50; Y02E10/549
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
97 words
A photoconductive composition comprising an organic, photoconductive, polymeric binder layer and a dye comprising at least two quinoid benzene rings linked through a bridging moiety selected from the group consisting of cyclopropane, cyclobutane and ═C═C═ n wherein n is 1 or 2, and wherein any ring carbons of the cyclopropane and cyclobutane bridging moieties not directly bonded to quinoid benzene rings are bonded to oxygen atoms to complete a carbonyl group, wherein said dye is present in a ratio of at least 0.5 × 10 -6 moles of dye per mole of said organic, photoconductive, polymeric binder.
Claim 2
Dependent Claim
97 words
A photoconductive composition comprising an organic, photoconductive, polymeric binder layer and a dye comprising at least two quinoid benzene rings linked through a bridging moiety selected from the group consisting of cyclopropane, cyclobutane and ═C═C═ n wherein n is 1 or 2, and wherein any ring carbons of the cyclopropane and cyclobutane bridging moieties not directly bonded to quinoid benzene rings are bonded to oxygen atoms to complete a carbonyl group, wherein said dye is present in a ratio of at least 0.5 × 10 -6 moles of dye per mole of said organic, photoconductive, polymeric binder.
Claim 3
Dependent Claim
25 words
The composition of claim 1 wherin the organic photoconductive polymeric binder layer consisting of poly(N-vinyl carbazole), polyanthracene, polyvinylacenaphthalene, poly(2,9-methylene fluorene), polyvinyl ferrocene, polybenzocarbazole, or polybenzoanthracene.
Claim 4
Dependent Claim
14 words
The composition of claim 1 wherein the organic photoconductive polymeric binder comprises poly(N-vinyl carbazole).
Claim 5
Dependent Claim
10 words
The composition of claim 1 coated on a conductive substrate.
Claim 6
Dependent Claim
23 words
The photoconductive composition of claim 1 wherein the bridging moiety of the dye is selected from the group consisting of cyclopropane and cyclobutane.
Claim 7
Dependent Claim
25 words
The composition of claim 5 wherein the organic photoconductive polymeric binder layer consisting of poly(N-vinyl carbazole), polyanthracene, polyvinylacenaphthalene, poly(2,9-methylene fluorene), polyvinyl ferrocene, polybenzocarbazole, or polybenzoanthracene.
Claim 8
Dependent Claim
14 words
The composition of claim 5 wherein the organic photoconductive polymeric binder comprises poly(N-vinyl carbazole).
Claim 9
Dependent Claim
10 words
The composition of claim 5 coated on a conductive substrate.
Claim 10
Dependent Claim
30 words
The photoconductive composition of claim 5 wherein at least one quinoid benzene ring has at least one substituent in the ortho position which is no more electron withdrawing than chloro.
Claim 11
Dependent Claim
25 words
The composition of claim 9 wherein the organic photoconductive polymeric binder layer consisting of poly(N-vinyl carbazole), polyanthracene, polyvinylacenaphthalene, poly(2,9-methylene fluorene), polyvinyl ferrocene, polybenzocarbazole, or polybenzoanthracene.
Claim 12
Dependent Claim
14 words
The composition of claim 9 wherein the organic photoconductive polymeric binder comprises poly(N-vinyl carbazole).
Claim 13
Dependent Claim
10 words
The composition of claim 9 coated on a conductive substrate.
Claim 14
Dependent Claim
28 words
The photoconductive composition of claim 9 wherein said one or two substituents ortho to the quino oxygen are straight or branched alkyl having 1 to 20 carbon atoms.
Claim 15
Dependent Claim
30 words
The photoconductive composition of claim 1 wherein at least one quinoid benzene ring has at least one substituent in the ortho position which is no more electron withdrawing than chloro.
Claim 16
Dependent Claim
25 words
The composition of claim 14 wherein the organic photoconductive polymeric binder layer consisting of poly(N-vinyl carbazole), polyanthracene, polyvinylacenaphthalene, poly(2,9-methylene fluorene), polyvinyl ferrocene, polybenzocarbazole, or polybenzoanthracene.
Claim 17
Dependent Claim
14 words
The composition of claim 14 wherein the organic photoconductive polymeric binder comprises poly(N-vinyl carbazole).
Claim 18
Dependent Claim
10 words
The composition of claim 14 coated on a conductive substrate.
Claim 19
Dependent Claim
67 words
The photoconductive composition of claim 1 wherein thhe dye is represented by any of the formulae: ##STR4## or A ═ C ═ C ═ n A wherein n is 1 or 2 A is a quinoid benzene ring which may have one or two substituents ortho to the quino oxygen which are no more electron withdrawing than chloro, and B is either A or an oxygen atom.
Claim 20
Dependent Claim
15 words
The photoconductive composition of claim 18 wherein the dye is selected from the formulae: ##STR5##
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-03 | 1981-04-04 | 1981-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-03 | 1985-04-04 | 1985-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-03 | 1989-04-04 | 1989-10-04 | $7700.00 | Window Closed / Lapsed |